Process for the manufacture of composite tools.



No. 830,030. PATENTED SEPT. 4 1906.

H. V. WILLE. I

PROCESS FOR THE MANUFACTURE OF COMPOSITE TOOLS. APPLICATION FILED NOV. 15. 1905.

7 T .7 iiiIi WITNESSES ENTOR 7% w 11 'I'TORNE Y.

iENRYv. wrnLE, OFIPHILADEILPHIA, PENNSYLVANIA.

PROCESS FOR THE -M ANUFACTURE OF COMPOSITE TOO LS- I No. 830,030.

Specification of Letters gatent.

Patented. Sept. 4, 1906.

Application filed November 15,1905. Serial its. 287,410.

1'0 aM whom it may concern:

- Be-it known that I, HENRY V. WILLE, a citizen of the United States, and a resident of the city and county of Philadelphia, State, of

Pennsylvania, have invented certain new.

' and useful Improvements in Processes for the Manufacture of Composite Tools, of which the following is a specification.

My invention relates to improvements in 1 methods for forminicomposite tools-that is,

area and preferably finish it roughly, and I.

tools having a stoc of a cheap material and a cutting part of a more expensive materiala high-speed alloy steel, for instance; "and the object of my invention is to furnish an inexpensive, rapid, and satisfactory method for securing the expensive cutting part-of the tool to the cheaper stock.

In carrying out my 1nvention ltake astock ofcomparatively large cross-sectional then connect this stock in any suitable manner with one terminal from .a source of electricity, the other terminal of which is formed by or brought in contact with a bar of highspeed alloy steel, the cross-sectional area of which is considerably smaller than that of the stock. The two metals bein brought into contact and the current turne on, the first is at the oint of contact melted upon its surface 0 y, but the second, owing to its small sectional area, is mpletely melted and combining with the melted surface ofthe larger bar is fused thereto.

- B proper and continued treatment as muc oft e latter bar can be fused to the former bar or stock as may be desired.

' In the accompanying drawings, Fi re-1 is a perspective v1ew of a stock for a lat e-tool; Flg. 2, a perspective view of the stock after the cutting-face of high-s eed alloy steel has been fused to it, the too being completely finished; Fig. 3 a diagrammatic view of an apparatus by means of which the face may \be fused to the stock of the tool.

ais the tool-stock, in the drawin s shown as a stock for a lathe-tool; but it wi be understood that I do not confine myself to any articular form of tool; I), the cutting-face o the tool, which is of high-speed alloy steel.

My method of securin the cutting-face of the stock is as follows: Tie stock is placed in electrical connection with one terminal of a Suitableelectric circuit 'upon an iron table c,

- the part of t Fig. 3, for instance, which is connected by a wire (1 to one terminal of the source of electricity, and a bar e of the high-s eed alloy steel is brought in contact, or near y so, with e stock to which it is desired to secure the cutting-face. The other terminal f of the electric current is now brou ht into electrical contact with the bar of hig -speed alloy steel, so that the. current will pass directly through-this bar and that part of the stock to which the cutting-face is to be secured. Instantly the connection is made the arc melts at the point of contact the bar of high-speed alloy steel, which is of comparatively small cross -section, as shown, and owing to its greater area also melts the face only of the stock against which this bar rests. The two metals are thus fused together.

The amount of metal that is melted and fused to thestock can be increased in thickness almost up to any point, and'as highspeed alloy steel is benefitted by being subjected to very high temperatures the article produced-by this process possesses superior cutting quality.

Durin the process of fusing the cuttingface of t e tool to the stock thatpart of the stock to which the face is being fused is preferably inclosed by walls of a non-fusible material ggraphite, for instancewhich not only conserves the heat, but which also acts.

to retain in place any ofthe melted metal which might runoff if some stop were not provided.

Having thus described my invention, 1

claim'as new and desire to secure by Letters Patent v The described method forforming a composite tool having a cutting-face of highspeed alloy steel and a stock of a cheapersteel which consists-in connecting astock of comparatively large sectional area to one terminal of an electric circuit and a bar of highspeed steel of comparitively small sectional area to the other terminal of said circuit and fusing said parts by bringing said stock and bar into contact so as to melt the latter completely while. the surface only. of the former is melted.

-- HENRY V. WILLE- Witnesses: I

GEORGE W. SELTZER,

GHARLEs A. BUTTER. 

